1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1995 Terrence R. Lambert 5 * All rights reserved. 6 * 7 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 8 * The Regents of the University of California. All rights reserved. 9 * (c) UNIX System Laboratories, Inc. 10 * All or some portions of this file are derived from material licensed 11 * to the University of California by American Telephone and Telegraph 12 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 13 * the permission of UNIX System Laboratories, Inc. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 */ 43 44 #include <sys/cdefs.h> 45 #include "opt_ddb.h" 46 #include "opt_kdb.h" 47 #include "opt_init_path.h" 48 #include "opt_verbose_sysinit.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/boottrace.h> 53 #include <sys/conf.h> 54 #include <sys/cpuset.h> 55 #include <sys/dtrace_bsd.h> 56 #include <sys/epoch.h> 57 #include <sys/eventhandler.h> 58 #include <sys/exec.h> 59 #include <sys/file.h> 60 #include <sys/filedesc.h> 61 #include <sys/imgact.h> 62 #include <sys/jail.h> 63 #include <sys/kernel.h> 64 #include <sys/ktr.h> 65 #include <sys/lock.h> 66 #include <sys/loginclass.h> 67 #include <sys/malloc.h> 68 #include <sys/mount.h> 69 #include <sys/mutex.h> 70 #include <sys/proc.h> 71 #include <sys/racct.h> 72 #include <sys/reboot.h> 73 #include <sys/resourcevar.h> 74 #include <sys/queue.h> 75 #include <sys/queue_mergesort.h> 76 #include <sys/sched.h> 77 #include <sys/signalvar.h> 78 #include <sys/sx.h> 79 #include <sys/syscallsubr.h> 80 #include <sys/sysctl.h> 81 #include <sys/sysent.h> 82 #include <sys/sysproto.h> 83 #include <sys/unistd.h> 84 #include <sys/vmmeter.h> 85 #include <sys/vnode.h> 86 87 #include <machine/cpu.h> 88 89 #include <security/audit/audit.h> 90 #include <security/mac/mac_framework.h> 91 92 #include <vm/vm.h> 93 #include <vm/vm_param.h> 94 #include <vm/vm_extern.h> 95 #include <vm/pmap.h> 96 #include <vm/vm_map.h> 97 #include <sys/copyright.h> 98 99 #include <ddb/ddb.h> 100 #include <ddb/db_sym.h> 101 102 void mi_startup(void); /* Should be elsewhere */ 103 104 /* Components of the first process -- never freed. */ 105 static struct session session0; 106 static struct pgrp pgrp0; 107 struct proc proc0; 108 struct thread0_storage thread0_st __aligned(32); 109 struct vmspace vmspace0; 110 struct proc *initproc; 111 112 int 113 linux_alloc_current_noop(struct thread *td __unused, int flags __unused) 114 { 115 return (0); 116 } 117 int (*lkpi_alloc_current)(struct thread *, int) = linux_alloc_current_noop; 118 119 #ifndef BOOTHOWTO 120 #define BOOTHOWTO 0 121 #endif 122 int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 123 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 124 "Boot control flags, passed from loader"); 125 126 #ifndef BOOTVERBOSE 127 #define BOOTVERBOSE 0 128 #endif 129 int bootverbose = BOOTVERBOSE; 130 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 131 "Control the output of verbose kernel messages"); 132 133 #ifdef VERBOSE_SYSINIT 134 /* 135 * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to 136 * dictate the default VERBOSE_SYSINIT behavior. Significant values for this 137 * option and associated tunable are: 138 * - 0, 'compiled in but silent by default' 139 * - 1, 'compiled in but verbose by default' (default) 140 */ 141 int verbose_sysinit = VERBOSE_SYSINIT; 142 TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit); 143 #endif 144 145 #ifdef INVARIANTS 146 FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 147 #endif 148 149 /* 150 * This ensures that there is at least one entry so that the sysinit_set 151 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 152 * executed. 153 */ 154 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 155 156 /* 157 * The sysinit linker set compiled into the kernel. These are placed onto the 158 * sysinit list by mi_startup; sysinit_add can add (e.g., from klds) additional 159 * sysinits to the linked list but the linker set here does not change. 160 */ 161 SET_DECLARE(sysinit_set, struct sysinit); 162 163 /* 164 * The sysinit lists. Items are moved to sysinit_done_list when done. 165 */ 166 static STAILQ_HEAD(sysinitlist, sysinit) sysinit_list; 167 static struct sysinitlist sysinit_done_list = 168 STAILQ_HEAD_INITIALIZER(sysinit_done_list); 169 170 /* 171 * Compare two sysinits; return -1, 0, or 1 if a comes before, at the same time 172 * as, or after b. 173 */ 174 static int 175 sysinit_compar(struct sysinit *a, struct sysinit *b, void *thunk __unused) 176 { 177 178 if (a->subsystem < b->subsystem) 179 return (-1); 180 if (a->subsystem > b->subsystem) 181 return (1); 182 if (a->order < b->order) 183 return (-1); 184 if (a->order > b->order) 185 return (1); 186 return (0); 187 } 188 189 static void 190 sysinit_mklist(struct sysinitlist *list, struct sysinit **set, 191 struct sysinit **set_end) 192 { 193 struct sysinit **sipp; 194 195 TSENTER(); 196 TSENTER2("listify"); 197 STAILQ_INIT(list); 198 for (sipp = set; sipp < set_end; sipp++) 199 STAILQ_INSERT_TAIL(list, *sipp, next); 200 TSEXIT2("listify"); 201 TSENTER2("mergesort"); 202 STAILQ_MERGESORT(list, NULL, sysinit_compar, sysinit, next); 203 TSEXIT2("mergesort"); 204 TSEXIT(); 205 } 206 207 /* 208 * Merge a new sysinit set into the sysinit list. 209 */ 210 void 211 sysinit_add(struct sysinit **set, struct sysinit **set_end) 212 { 213 struct sysinitlist new_list; 214 215 TSENTER(); 216 217 /* Construct a sorted list from the new sysinits. */ 218 sysinit_mklist(&new_list, set, set_end); 219 220 /* Merge the new list into the existing one. */ 221 TSENTER2("STAILQ_MERGE"); 222 STAILQ_MERGE(&sysinit_list, &new_list, NULL, sysinit_compar, sysinit, next); 223 TSEXIT2("STAILQ_MERGE"); 224 225 TSEXIT(); 226 } 227 228 #if defined (DDB) && defined(VERBOSE_SYSINIT) 229 static const char * 230 symbol_name(vm_offset_t va, db_strategy_t strategy) 231 { 232 const char *name; 233 c_db_sym_t sym; 234 db_expr_t offset; 235 236 if (va == 0) 237 return (NULL); 238 sym = db_search_symbol(va, strategy, &offset); 239 if (offset != 0) 240 return (NULL); 241 db_symbol_values(sym, &name, NULL); 242 return (name); 243 } 244 #endif 245 246 /* 247 * System startup; initialize the world, create process 0, mount root 248 * filesystem, and fork to create init and pagedaemon. Most of the 249 * hard work is done in the lower-level initialization routines including 250 * startup(), which does memory initialization and autoconfiguration. 251 * 252 * This allows simple addition of new kernel subsystems that require 253 * boot time initialization. It also allows substitution of subsystem 254 * (for instance, a scheduler, kernel profiler, or VM system) by object 255 * module. Finally, it allows for optional "kernel threads". 256 */ 257 void 258 mi_startup(void) 259 { 260 261 struct sysinit *sip; 262 int last; 263 #if defined(VERBOSE_SYSINIT) 264 int verbose; 265 #endif 266 267 TSENTER(); 268 269 if (boothowto & RB_VERBOSE) 270 bootverbose++; 271 272 /* Construct and sort sysinit list. */ 273 sysinit_mklist(&sysinit_list, SET_BEGIN(sysinit_set), SET_LIMIT(sysinit_set)); 274 275 last = SI_SUB_COPYRIGHT; 276 #if defined(VERBOSE_SYSINIT) 277 verbose = 0; 278 #if !defined(DDB) 279 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 280 #endif 281 #endif 282 283 /* 284 * Perform each system initialization task from the ordered list. Note 285 * that if sysinit_list is modified (e.g. by a KLD) we will nonetheless 286 * always perform the earlist-sorted sysinit at each step; using the 287 * STAILQ_FOREACH macro would result in items being skipped if inserted 288 * earlier than the "current item". 289 */ 290 while ((sip = STAILQ_FIRST(&sysinit_list)) != NULL) { 291 STAILQ_REMOVE_HEAD(&sysinit_list, next); 292 STAILQ_INSERT_TAIL(&sysinit_done_list, sip, next); 293 294 if (sip->subsystem == SI_SUB_DUMMY) 295 continue; /* skip dummy task(s)*/ 296 297 if (sip->subsystem > last) 298 BOOTTRACE_INIT("sysinit 0x%7x", sip->subsystem); 299 300 #if defined(VERBOSE_SYSINIT) 301 if (sip->subsystem > last && verbose_sysinit != 0) { 302 verbose = 1; 303 printf("subsystem %x\n", last); 304 } 305 if (verbose) { 306 #if defined(DDB) 307 const char *func, *data; 308 309 func = symbol_name((vm_offset_t)sip->func, 310 DB_STGY_PROC); 311 data = symbol_name((vm_offset_t)sip->udata, 312 DB_STGY_ANY); 313 if (func != NULL && data != NULL) 314 printf(" %s(&%s)... ", func, data); 315 else if (func != NULL) 316 printf(" %s(%p)... ", func, sip->udata); 317 else 318 #endif 319 printf(" %p(%p)... ", sip->func, 320 sip->udata); 321 } 322 #endif 323 324 /* Call function */ 325 (*(sip->func))(sip->udata); 326 327 #if defined(VERBOSE_SYSINIT) 328 if (verbose) 329 printf("done.\n"); 330 #endif 331 332 /* Check off the one we're just done */ 333 last = sip->subsystem; 334 } 335 336 TSEXIT(); /* Here so we don't overlap with start_init. */ 337 BOOTTRACE("mi_startup done"); 338 339 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 340 mtx_unlock(&Giant); 341 342 /* 343 * Now hand over this thread to swapper. 344 */ 345 swapper(); 346 /* NOTREACHED*/ 347 } 348 349 static void 350 print_caddr_t(void *data) 351 { 352 printf("%s", (char *)data); 353 } 354 355 static void 356 print_version(void *data __unused) 357 { 358 int len; 359 360 /* Strip a trailing newline from version. */ 361 len = strlen(version); 362 while (len > 0 && version[len - 1] == '\n') 363 len--; 364 printf("%.*s %s\n", len, version, machine); 365 printf("%s\n", compiler_version); 366 } 367 368 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 369 copyright); 370 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 371 trademark); 372 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 373 374 #ifdef WITNESS 375 static char wit_warn[] = 376 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 377 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH, 378 print_caddr_t, wit_warn); 379 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH, 380 print_caddr_t, wit_warn); 381 #endif 382 383 #ifdef DIAGNOSTIC 384 static char diag_warn[] = 385 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 386 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 387 print_caddr_t, diag_warn); 388 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH, 389 print_caddr_t, diag_warn); 390 #endif 391 392 #if __SIZEOF_LONG__ == 4 393 static char ilp32_warn[] = 394 "WARNING: 32-bit kernels are deprecated and may be removed in FreeBSD 15.0.\n"; 395 SYSINIT(ilp32warn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 396 print_caddr_t, ilp32_warn); 397 SYSINIT(ilp32warn2, SI_SUB_LAST, SI_ORDER_FIFTH, 398 print_caddr_t, ilp32_warn); 399 #endif 400 401 static int 402 null_fetch_syscall_args(struct thread *td __unused) 403 { 404 405 panic("null_fetch_syscall_args"); 406 } 407 408 static void 409 null_set_syscall_retval(struct thread *td __unused, int error __unused) 410 { 411 412 panic("null_set_syscall_retval"); 413 } 414 415 static void 416 null_set_fork_retval(struct thread *td __unused) 417 { 418 419 } 420 421 struct sysentvec null_sysvec = { 422 .sv_size = 0, 423 .sv_table = NULL, 424 .sv_fixup = NULL, 425 .sv_sendsig = NULL, 426 .sv_sigcode = NULL, 427 .sv_szsigcode = NULL, 428 .sv_name = "null", 429 .sv_coredump = NULL, 430 .sv_minsigstksz = 0, 431 .sv_minuser = VM_MIN_ADDRESS, 432 .sv_maxuser = VM_MAXUSER_ADDRESS, 433 .sv_usrstack = USRSTACK, 434 .sv_psstrings = PS_STRINGS, 435 .sv_psstringssz = sizeof(struct ps_strings), 436 .sv_stackprot = VM_PROT_ALL, 437 .sv_copyout_strings = NULL, 438 .sv_setregs = NULL, 439 .sv_fixlimit = NULL, 440 .sv_maxssiz = NULL, 441 .sv_flags = 0, 442 .sv_set_syscall_retval = null_set_syscall_retval, 443 .sv_fetch_syscall_args = null_fetch_syscall_args, 444 .sv_syscallnames = NULL, 445 .sv_schedtail = NULL, 446 .sv_thread_detach = NULL, 447 .sv_trap = NULL, 448 .sv_set_fork_retval = null_set_fork_retval, 449 .sv_regset_begin = NULL, 450 .sv_regset_end = NULL, 451 }; 452 453 /* 454 * The two following SYSINIT's are proc0 specific glue code. I am not 455 * convinced that they can not be safely combined, but their order of 456 * operation has been maintained as the same as the original init_main.c 457 * for right now. 458 */ 459 /* ARGSUSED*/ 460 static void 461 proc0_init(void *dummy __unused) 462 { 463 struct proc *p; 464 struct thread *td; 465 struct ucred *newcred; 466 struct uidinfo tmpuinfo; 467 struct loginclass tmplc = { 468 .lc_name = "", 469 }; 470 vm_paddr_t pageablemem; 471 int i; 472 473 GIANT_REQUIRED; 474 p = &proc0; 475 td = &thread0; 476 477 /* 478 * Initialize magic number and osrel. 479 */ 480 p->p_magic = P_MAGIC; 481 p->p_osrel = osreldate; 482 483 /* 484 * Initialize thread and process structures. 485 */ 486 procinit(); /* set up proc zone */ 487 threadinit(); /* set up UMA zones */ 488 489 /* 490 * Initialise scheduler resources. 491 * Add scheduler specific parts to proc, thread as needed. 492 */ 493 schedinit(); /* scheduler gets its house in order */ 494 495 /* 496 * Create process 0 (the swapper). 497 */ 498 LIST_INSERT_HEAD(&allproc, p, p_list); 499 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 500 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 501 sx_init(&pgrp0.pg_killsx, "killpg racer"); 502 p->p_pgrp = &pgrp0; 503 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 504 LIST_INIT(&pgrp0.pg_members); 505 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 506 507 pgrp0.pg_session = &session0; 508 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 509 refcount_init(&session0.s_count, 1); 510 session0.s_leader = p; 511 512 p->p_sysent = &null_sysvec; 513 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 514 p->p_flag2 = 0; 515 p->p_state = PRS_NORMAL; 516 p->p_klist = knlist_alloc(&p->p_mtx); 517 STAILQ_INIT(&p->p_ktr); 518 p->p_nice = NZERO; 519 td->td_tid = THREAD0_TID; 520 tidhash_add(td); 521 TD_SET_STATE(td, TDS_RUNNING); 522 td->td_pri_class = PRI_TIMESHARE; 523 td->td_user_pri = PUSER; 524 td->td_base_user_pri = PUSER; 525 td->td_lend_user_pri = PRI_MAX; 526 td->td_priority = PVM; 527 td->td_base_pri = PVM; 528 td->td_oncpu = curcpu; 529 td->td_flags = TDF_INMEM; 530 td->td_pflags = TDP_KTHREAD; 531 td->td_cpuset = cpuset_thread0(); 532 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 533 prison0_init(); 534 p->p_peers = 0; 535 p->p_leader = p; 536 p->p_reaper = p; 537 p->p_treeflag |= P_TREE_REAPER; 538 LIST_INIT(&p->p_reaplist); 539 540 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 541 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 542 543 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 544 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 545 callout_init(&td->td_slpcallout, 1); 546 TAILQ_INIT(&p->p_kqtim_stop); 547 548 /* Create credentials. */ 549 newcred = crget(); 550 newcred->cr_ngroups = 1; /* group 0 */ 551 /* A hack to prevent uifind from tripping over NULL pointers. */ 552 curthread->td_ucred = newcred; 553 tmpuinfo.ui_uid = 1; 554 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 555 newcred->cr_uidinfo = uifind(0); 556 newcred->cr_ruidinfo = uifind(0); 557 newcred->cr_loginclass = &tmplc; 558 newcred->cr_loginclass = loginclass_find("default"); 559 /* End hack. creds get properly set later with thread_cow_get_proc */ 560 curthread->td_ucred = NULL; 561 newcred->cr_prison = &prison0; 562 newcred->cr_users++; /* avoid assertion failure */ 563 p->p_ucred = crcowget(newcred); 564 newcred->cr_users--; 565 crfree(newcred); 566 #ifdef AUDIT 567 audit_cred_kproc0(newcred); 568 #endif 569 #ifdef MAC 570 mac_cred_create_swapper(newcred); 571 #endif 572 /* Create sigacts. */ 573 p->p_sigacts = sigacts_alloc(); 574 575 /* Initialize signal state for process 0. */ 576 siginit(&proc0); 577 578 /* Create the file descriptor table. */ 579 p->p_pd = pdinit(NULL, false); 580 p->p_fd = fdinit(); 581 p->p_fdtol = NULL; 582 583 /* Create the limits structures. */ 584 p->p_limit = lim_alloc(); 585 for (i = 0; i < RLIM_NLIMITS; i++) 586 p->p_limit->pl_rlimit[i].rlim_cur = 587 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 588 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 589 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 590 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 591 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 592 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 593 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 594 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 595 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 596 /* Cast to avoid overflow on i386/PAE. */ 597 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 598 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 599 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 600 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 601 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 602 p->p_cpulimit = RLIM_INFINITY; 603 604 PROC_LOCK(p); 605 thread_cow_get_proc(td, p); 606 PROC_UNLOCK(p); 607 608 /* Initialize resource accounting structures. */ 609 racct_create(&p->p_racct); 610 611 p->p_stats = pstats_alloc(); 612 613 /* Allocate a prototype map so we have something to fork. */ 614 p->p_vmspace = &vmspace0; 615 refcount_init(&vmspace0.vm_refcnt, 1); 616 pmap_pinit0(vmspace_pmap(&vmspace0)); 617 618 /* 619 * proc0 is not expected to enter usermode, so there is no special 620 * handling for sv_minuser here, like is done for exec_new_vmspace(). 621 */ 622 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 623 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 624 625 /* 626 * Call the init and ctor for the new thread and proc. We wait 627 * to do this until all other structures are fairly sane. 628 */ 629 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 630 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 631 #ifdef KDTRACE_HOOKS 632 kdtrace_proc_ctor(p); 633 kdtrace_thread_ctor(td); 634 #endif 635 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 636 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 637 638 /* 639 * Charge root for one process. 640 */ 641 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 642 PROC_LOCK(p); 643 racct_add_force(p, RACCT_NPROC, 1); 644 PROC_UNLOCK(p); 645 } 646 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 647 648 /* ARGSUSED*/ 649 static void 650 proc0_post(void *dummy __unused) 651 { 652 struct proc *p; 653 struct rusage ru; 654 struct thread *td; 655 656 /* 657 * Now we can look at the time, having had a chance to verify the 658 * time from the filesystem. Pretend that proc0 started now. 659 */ 660 sx_slock(&allproc_lock); 661 FOREACH_PROC_IN_SYSTEM(p) { 662 PROC_LOCK(p); 663 if (p->p_state == PRS_NEW) { 664 PROC_UNLOCK(p); 665 continue; 666 } 667 microuptime(&p->p_stats->p_start); 668 PROC_STATLOCK(p); 669 rufetch(p, &ru); /* Clears thread stats */ 670 p->p_rux.rux_runtime = 0; 671 p->p_rux.rux_uticks = 0; 672 p->p_rux.rux_sticks = 0; 673 p->p_rux.rux_iticks = 0; 674 PROC_STATUNLOCK(p); 675 FOREACH_THREAD_IN_PROC(p, td) { 676 td->td_runtime = 0; 677 } 678 PROC_UNLOCK(p); 679 } 680 sx_sunlock(&allproc_lock); 681 PCPU_SET(switchtime, cpu_ticks()); 682 PCPU_SET(switchticks, ticks); 683 } 684 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 685 686 /* 687 *************************************************************************** 688 **** 689 **** The following SYSINIT's and glue code should be moved to the 690 **** respective files on a per subsystem basis. 691 **** 692 *************************************************************************** 693 */ 694 695 /* 696 * List of paths to try when searching for "init". 697 */ 698 static char init_path[MAXPATHLEN] = 699 #ifdef INIT_PATH 700 __XSTRING(INIT_PATH); 701 #else 702 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 703 #endif 704 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 705 "Path used to search the init process"); 706 707 /* 708 * Shutdown timeout of init(8). 709 * Unused within kernel, but used to control init(8), hence do not remove. 710 */ 711 #ifndef INIT_SHUTDOWN_TIMEOUT 712 #define INIT_SHUTDOWN_TIMEOUT 120 713 #endif 714 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 715 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 716 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 717 "Unused within kernel, but used to control init(8)"); 718 719 /* 720 * Start the initial user process; try exec'ing each pathname in init_path. 721 * The program is invoked with one argument containing the boot flags. 722 */ 723 static void 724 start_init(void *dummy) 725 { 726 struct image_args args; 727 int error; 728 char *var, *path; 729 char *free_init_path, *tmp_init_path; 730 struct thread *td; 731 struct proc *p; 732 struct vmspace *oldvmspace; 733 734 TSENTER(); /* Here so we don't overlap with mi_startup. */ 735 736 td = curthread; 737 p = td->td_proc; 738 739 vfs_mountroot(); 740 741 /* Wipe GELI passphrase from the environment. */ 742 kern_unsetenv("kern.geom.eli.passphrase"); 743 744 /* For Multicons, report which console is primary to both */ 745 if (boothowto & RB_MULTIPLE) { 746 if (boothowto & RB_SERIAL) 747 printf("Dual Console: Serial Primary, Video Secondary\n"); 748 else 749 printf("Dual Console: Video Primary, Serial Secondary\n"); 750 } 751 752 if ((var = kern_getenv("init_path")) != NULL) { 753 strlcpy(init_path, var, sizeof(init_path)); 754 freeenv(var); 755 } 756 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 757 758 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 759 if (bootverbose) 760 printf("start_init: trying %s\n", path); 761 762 memset(&args, 0, sizeof(args)); 763 error = exec_alloc_args(&args); 764 if (error != 0) 765 panic("%s: Can't allocate space for init arguments %d", 766 __func__, error); 767 768 error = exec_args_add_fname(&args, path, UIO_SYSSPACE); 769 if (error != 0) 770 panic("%s: Can't add fname %d", __func__, error); 771 error = exec_args_add_arg(&args, path, UIO_SYSSPACE); 772 if (error != 0) 773 panic("%s: Can't add argv[0] %d", __func__, error); 774 if (boothowto & RB_SINGLE) 775 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE); 776 if (error != 0) 777 panic("%s: Can't add argv[0] %d", __func__, error); 778 779 /* 780 * Now try to exec the program. If can't for any reason 781 * other than it doesn't exist, complain. 782 * 783 * Otherwise, return via fork_trampoline() all the way 784 * to user mode as init! 785 */ 786 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0, 787 ("nested execve")); 788 oldvmspace = p->p_vmspace; 789 error = kern_execve(td, &args, NULL, oldvmspace); 790 KASSERT(error != 0, 791 ("kern_execve returned success, not EJUSTRETURN")); 792 if (error == EJUSTRETURN) { 793 exec_cleanup(td, oldvmspace); 794 free(free_init_path, M_TEMP); 795 TSEXIT(); 796 return; 797 } 798 if (error != ENOENT) 799 printf("exec %s: error %d\n", path, error); 800 } 801 free(free_init_path, M_TEMP); 802 printf("init: not found in path %s\n", init_path); 803 panic("no init"); 804 } 805 806 /* 807 * Like kproc_create(), but runs in its own address space. We do this 808 * early to reserve pid 1. Note special case - do not make it 809 * runnable yet, init execution is started when userspace can be served. 810 */ 811 static void 812 create_init(const void *udata __unused) 813 { 814 struct fork_req fr; 815 struct ucred *newcred, *oldcred; 816 struct thread *td; 817 int error; 818 819 bzero(&fr, sizeof(fr)); 820 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 821 fr.fr_procp = &initproc; 822 error = fork1(&thread0, &fr); 823 if (error) 824 panic("cannot fork init: %d\n", error); 825 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 826 /* divorce init's credentials from the kernel's */ 827 newcred = crget(); 828 sx_xlock(&proctree_lock); 829 PROC_LOCK(initproc); 830 initproc->p_flag |= P_SYSTEM | P_INMEM; 831 initproc->p_treeflag |= P_TREE_REAPER; 832 oldcred = initproc->p_ucred; 833 crcopy(newcred, oldcred); 834 #ifdef MAC 835 mac_cred_create_init(newcred); 836 #endif 837 #ifdef AUDIT 838 audit_cred_proc1(newcred); 839 #endif 840 proc_set_cred(initproc, newcred); 841 td = FIRST_THREAD_IN_PROC(initproc); 842 crcowfree(td); 843 td->td_realucred = crcowget(initproc->p_ucred); 844 td->td_ucred = td->td_realucred; 845 PROC_UNLOCK(initproc); 846 sx_xunlock(&proctree_lock); 847 crfree(oldcred); 848 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 849 start_init, NULL); 850 } 851 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 852 853 /* 854 * Make it runnable now. 855 */ 856 static void 857 kick_init(const void *udata __unused) 858 { 859 struct thread *td; 860 861 td = FIRST_THREAD_IN_PROC(initproc); 862 thread_lock(td); 863 TD_SET_CAN_RUN(td); 864 sched_add(td, SRQ_BORING); 865 } 866 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 867 868 /* 869 * DDB(4). 870 */ 871 #ifdef DDB 872 static void 873 db_show_print_syinit(struct sysinit *sip, bool ddb) 874 { 875 const char *sname, *funcname; 876 c_db_sym_t sym; 877 db_expr_t offset; 878 879 #define xprint(...) \ 880 if (ddb) \ 881 db_printf(__VA_ARGS__); \ 882 else \ 883 printf(__VA_ARGS__) 884 885 if (sip == NULL) { 886 xprint("%s: no sysinit * given\n", __func__); 887 return; 888 } 889 890 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); 891 db_symbol_values(sym, &sname, NULL); 892 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); 893 db_symbol_values(sym, &funcname, NULL); 894 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); 895 xprint(" %#08x %#08x\n", sip->subsystem, sip->order); 896 xprint(" %p(%s)(%p)\n", 897 sip->func, (funcname != NULL) ? funcname : "", sip->udata); 898 #undef xprint 899 } 900 901 DB_SHOW_COMMAND_FLAGS(sysinit, db_show_sysinit, DB_CMD_MEMSAFE) 902 { 903 struct sysinit *sip; 904 905 db_printf("SYSINIT vs Name(Ptr)\n"); 906 db_printf(" Subsystem Order\n"); 907 db_printf(" Function(Name)(Arg)\n"); 908 STAILQ_FOREACH(sip, &sysinit_done_list, next) { 909 db_show_print_syinit(sip, true); 910 if (db_pager_quit) 911 return; 912 } 913 STAILQ_FOREACH(sip, &sysinit_list, next) { 914 db_show_print_syinit(sip, true); 915 if (db_pager_quit) 916 break; 917 } 918 } 919 #endif /* DDB */ 920